mint/deploy/roles/os/tasks/ulimits.yml

- name: Setup nofile for system
  become: true
  ansible.builtin.lineinfile:
    path: /etc/systemd/system.conf
    regexp: "^DefaultLimitNOFILE="
    line: DefaultLimitNOFILE=2097152
    backup: true

- name: Setup nproc for system
  become: true
  ansible.builtin.lineinfile:
    path: /etc/systemd/system.conf
    regexp: "^DefaultLimitNPROC"
    line: DefaultLimitNPROC=524288
    backup: true

- name: Setup nofile for user
  become: true
  ansible.builtin.lineinfile:
    path: /etc/systemd/user.conf
    regexp: "^DefaultLimitNOFILE="
    line: DefaultLimitNOFILE=1048576
    backup: true

- name: Setup nproc for user
  become: true
  ansible.builtin.lineinfile:
    path: /etc/systemd/user.conf
    regexp: "^DefaultLimitNPROC"
    line: DefaultLimitNPROC=262144
    backup: true

- name: Set user level ppen file limits for root
  become: true
  ansible.builtin.lineinfile:
    path: /etc/security/limits.conf
    line: root        soft nofile 10240
    backup: true

- name: Set user level open file limits for {{ ansible_user }}
  become: true
  lineinfile:
    path: /etc/security/limits.conf
    line: "{{ ansible_user }}        soft nofile 10240"
    backup: true

# https://docs.oracle.com/en/database/oracle/oracle-database/12.2/ladbi/changing-kernel-parameter-values.html#GUID-FB0CC366-61C9-4AA2-9BE7-233EB6810A31
- name: Setup file max
  become: true
  lineinfile:
    path: "/etc/sysctl.d/100-fs.conf"
    state: present
    line: fs.file-max = 6815744
    create: true

- name: Setup file max
  become: true
  lineinfile:
    path: "/etc/sysctl.d/100-fs.conf"
    state: present
    line: fs.inotify.max_user_watches = 512000
    create: true